Q. Consider a situation in which a welding operation is being performed with V = 20 volts, I = 200 A, and the cross-sectional area of the weld bead is 30 mm2. Estimate the welding speed if the workpiece and electrode are made of (a) aluminum, (b) carbon steel, and (c) titanium. Use an efficiency of 75%.
✅ Correct Answer: (B)
34.5 mm/s
Explanation: for aluminum, the specific energy required is u = 2.9 j/mm3 therefore,